<template>
  <el-container class="home-container">
    <!--头部-->
    <el-header class="el-header">
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体-->
    <el-container>
      <!--侧边栏-->
      <el-aside class="el-aside" :width="isCollapse ? '64px':'200px'">
        <div class="toggel-button" @click="toggleCollapse">|||</div>
        <!--侧边栏菜单-->
        <el-menu
          style="width: 100%;"
          background-color="#3A3F4D"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath">
          <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <!--一级菜单的模板区域-->
            <template slot="title">
              <i :class="iconObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>

            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
                          @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>

          </el-submenu>

        </el-menu>
      </el-aside>
      <!--内容区域-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    name: 'Home',
    data() {
      return {
        menulist: [],
        iconObj: {
          '125': 'iconfont icon-user',
          '103': 'iconfont icon-tijikongjian',
          '101': 'iconfont icon-shangpin',
          '102': 'iconfont icon-danju',
          '145': 'iconfont icon-baobiao'
        },
        //是否折叠：默认不折叠
        isCollapse: false,
        activePath:''
      }
    },
    created() {
      this.getMenuList()
      this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
      logout() {
        window.sessionStorage.clear()
        this.$router.push('/login')
      },
      //获取所有的菜单
      async getMenuList() {
        const { data: res } = await this.$http.get('menus')
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menulist = res.data
        console.log(res.data)
      },
      //菜单的折叠和展开
      toggleCollapse() {
        this.isCollapse = !this.isCollapse
      },
      //保存连接的激活状态
      saveNavState(activePath){
        this.activePath=activePath
        window.sessionStorage.setItem('activePath', activePath)
      }
    }
  }
</script>

<style scoped lang="less">
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #3F4648;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;

    > div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #3A3F4C;
  }

  .iconfont {
    margin-right: 10px;
  }

  .toggel-button {
    background-color: #535B6E;
    color: #ffffff;
    text-align: center;
    line-height: 24px;
    font-size: 10px;
    letter-spacing: 0.5em;
    cursor: pointer;
  }
</style>
